Smallpox Vaccine. The American public has not received routine smallpoxvaccinations since 1972. According to the CDC “The U.S. government has enough vaccine to vaccinate every person in the United States in the event of a smallpox emergency.” This is part of Emergency Prepared & Response for possible future bioterrorism (in aftermath of 9/11).**http://www.bt.cdc.gov/agent/smallpox/vaccination/facts.asp**